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How to train great danes 
Start early. 
Great danes have an innate need to please, so your puppy will be easy to train. Since your great dane is so large, it is important to start as early as you can to help him learn good behavior.
This will ensure that, as he grows, he will listen to you and follow your lead. This will be easier for you because he will be harder to convince to do things the older and larger he gets.